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Author Question: By 4 months, babies have mastered size constancy, brightness constancy, color constancy, and shape constancy. (Read 92 times) |
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Everyone has one nostril that is larger than the other.
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The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.